Stories of reproduction are "the bottom line", so to speak, of perceptions of gender and gender difference. We discuss how gender is intricately and inadvertently implied in stories where egg and sperm cells take centre stage; on the one hand the gametes imply the meaning of women and men,...
How many drops of sperm are needed to get pregnant?If your sperm count is normal, you will ejaculate millions and millions of sperm cells. But only one of them is required to fertilize an egg and start a pregnancy. What’s an ideal sperm count for reproduction?You should have at least ...
Sperm, male reproductive cell, produced by most animals. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) the ovum (egg) of a female to produce a new offspring. Mature sperm have two distingu
Scientists have pinpointed how sperm and egg fuse together across the animal kingdom, from fish to people.
This doesn't mean men and women will soon be donating skin cells rather than sperm and egg at fertility clinics. Eventually, however, the findings could open the door to more intensive research onhuman geneticsand certaincancers, and could impact fertility treatments sometime in the future. ...
The sperm cell´s function is to enable sexual reproduction through its union with the female egg during fertilization. For this to happen, it is very important that the sperm cells maintain their structure and DNA intact during their journey to the egg. ...
However, the precise role of the male and female gametes in the progression of karyogamy still remains elusive. Here, we show that the sperm cell possesses the unique property to drive steady and swift nuclear fusion. When we fertilized egg cells with sperm cells in vitro, the immediate ...
In sexual reproduction, interactions between the gamete cells, be they sperm and egg or different mating types, initiate the next generation, so an insight of evolutionary processes relies on understanding factors that influence these ga... TL Karr,WJ Swanson,RR Snook - 《Sperm Biology》 被引量...
Table 1 Milt volume, sperm number, and egg number obtained from recipients receiving in vitro-expanded (Cul-TP) and non-cultured (Non-cul-TP) type A spermatogonia. Full size table Progeny tests were performed to examine the functionality of gametes derived from in vitro-expanded ASGs. Gametes...
Reconstitution of prospermatogonial specification in vitro from human induced pluripotent stem cells Article Open access 09 November 2020 Introduction Fertilization integrates multiple cell-autonomous processes to transform a sperm and an oocyte (egg) into a totipotent embryo. In mammals, the fertilizing...